Condensation-preventer.



No; 845,029. 4 PATENTED FEB 19, 1907.

- B. 0. OAPEN.

OONDENSATION PREVENTER.

APPLICATION FILED JAN.17, 1906.

W! TNESSES j I B17601);

INVENTOR;

I I i" a M v 1 1 EDWY O. CAPEN, OF BUFFALO, NEW YORK.

CONDENSATlON-PREVENTER.

Specification of Letters Patent. Patented Feb. 19, 1907.

Application filed January 1'7, 1906, Serial No. 296,563.

the inner side of this and similar windows;

To all whom it may concern:

but in the present invention the object is ac- Be it known that I, EDWY O. CAPEN, a citi- Zen of the United States, and a resident of complished by admitting small jets of air Buffalo, Erie county, State of New York, I around the edge of the glass and directing have invented certain new and useful Imthem across its inner face. This is accomprovements in Condensation-Preventers; and plished as follows: my preferred manner of carrying out the in- The letter F designates the frame of the vention is set forth in the following full, clear, window, and G the glass. The latter instead and exact description, terminating with of resting against a shoulder in the frame, as claims particularly specifying the novelty. usual, is held therein between outer headings This invention relates to window-ventila- O and inner beadings I, either or both of tors, and more especially to those devices j which may be removable for the purpose of which are adapted for the prevention of inserting or replacing the glass. By prefercondensation. ence the outer beading is of one size through- It is well known by locomotive-engineers, out, and by preference the inner beading has electric-street-car motormen, and others projections P at intervals which extend a lit whose calling requires them constantly to tie further inward over the inner face of the look through a window from within a cab or glass than the remaining portion of the beadthe like that in cold weather moisture and ing. The glass G preferably fits within the frost will accumulate on the inside of the frame F, and its edges are held by contact glass and render it difficult and in some cases therein; but cut into said frame at points 0pimpcssible to see out. posite the projections are recesses R. (Best The present invention is designed to overseen in Fig. 4:.) The inner faces of the beadcome this difliculty, to which end it consists ings-that is, those faces next to the glassin the construction of a window-ventilator are cut away slightly, as at V, at points oppoadapted to permit theentrance of small jets site said recesses It, and the cut-away porof cold air past the edges of the glass and to tions and recesses therefore coact to produce direct them across its inner surface, all as passages for the inflow of air from next the hereinafter more fully described and claimed, outer face of the glass. and as shown in the drawings, wherein In use the air strildng the outer face of the Figure 1 is an inside elevation of the front glass G is deflected and spread over its surpanel of an engineers locomotive-cab with face and thrown radially against the outer the lower part of the inner beading removed. beading O. Entering the cut-away portions Figs. 2 and 3 are sections through the same V therein, it passes around the edges of the on the lines 2 2 and 3 3. Fig. 4 is an inner glass through the recesses R in the frame and edge view of one of the side bars of the is directed into the cut-away portions V of frame with portions of the heading rethe inner beading I. These cut-away pormoved. Fig. 5 is an enlarged sectional detions are formed by preference under the tail of a form which may be used in some projections I and hence the inflowing jets of air are directed from the several edges of the glass over and across its inner face, rather ases.

While it will be understood that this invention is useful in a variety of places, I have herein illustrated and described it as used in connection with the forward window of a'locomotivecab-that window behind which the engineer sits and through which he watches the track ahead. This window stands squarely at right angles to the line of progress and its outer side takes the impact of a strong current of air which is set up by the speed of the engine. It is manifestly essential that the glass in the window be clean and clear from frost, lest the engineers view of the trackway be obstructed. Various devices have heretofore been contrived for preventing the accumulation of condensation on into the face and eyes of the engineer. It will be found in use that when the cold outside air is thus allowed to blow across the inner face of the glass no condensation or frost will form thereon, and yet the draft will not be such as will be injurious to the engineer.

In Fig. 5 is illustrated, on a somewhat larger scale, a slight variation, which I find it desirable in some cases to employ, especially where the pane of glass is quite wide or large and the distance from its edges to the center is considerable. In such cases and under some circumstances the blast of air admitted 1 around the edges of the glass may not be than being permitted to blow toward anddirected across its inner surface with sufficient force. In order to give more impetus to the incoming air, it will be seen in this view how the outer beading 0 may be cut away at V at an incline, so as to present a rather large mouth for the inlet of the outside air, also how the recess R may be made larger and ossibly rounded at its bottom to admit of t e free passage of the jet of air, and also how the inner beading I may have its cut-away V 2 tapered or undercut, so as to be larger where it communicates with the recess R and smaller where the jet of air issues on the inner face of the glass. In practice I find that this construction directs the jets with considerably more force across the inner face of the pane than the other.

What is claimed as new is 1. A condensation-preventer consisting of a pane of glass and its frame, and openings in the latter next the pane for admitting the external air which strikes the outer face of the glass and so shaped as to direct it from the sides across its inner face.

v 2. A condensation-preventer consisting of a pane of glass, a frame surrounding its edges and having recesses at certain points next said edges, and the outer and inner headings holding the glass in the frame and cut away at points to communicate with said recesses.

3. A condensation-preventer consisting of a pane of glass, a frame surrounding its edges and having recesses at certain points next said edges, the outer and inner headings holding the glass in the frame and cut away at points to communicate with said recesses, and projections on the inner beading at the points where it is cut away, as and for the purpose set forth.

4. A condensation-preventer consisting of a pane of glass, a frame within which it is fitted, means consisting of recesses at certain points for permitting the passage of the exterior air to the interior of the pane, and outer and inner headings holding the pane in the frame and cut away on those faces adjacent the pane, for the purpose set forth.

5. A condensation-preventer consisting of a pane of glass, a frame within which it is fitted and having recesses at certain points adjacent the edge of the glass, and inner and outer headings holding the pane in the frame and cut away on those faces adjacent said pane, the cut-away portion of the outer beading tapering toward said recess and that of the inner beading being larger next the rel cess and tapering away from it.

I In testimony whereof I have hereunto subi scribed my signature this the th day of January, A. D. 1906.

EDWY O. CAPEN.

l/Vitnesses:

WILLARD T. BUSHMAN, CHARLES K. ROBINSON. 

